Computer Musician, Programmer, Hardware Hacker

Here’s a sketch for an upcoming performance, happening at Mariposa, an artist live/work space in Tijuana. Using homebrew computer-controlled hardware into a custom software filterbank.

Here’s where the gig is:

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Rehearsal for California Electronic Music Exchange Concerts on 4.27.2012 and 4.28.2012

Using custom hardware (pucktronix tabulaRasa and snake.corral, etc) and software – http://www.gregsurges.com/

tabulaRasa V 1.03 software is available at https://bitbucket.org/pucktronix/tabularasa/downloads and adds the ability to load a folder full of samples into the interface with one click of the new “folder” button in the lower left.

Here’s a link to download a little absolute pitch ear training program I recently completed.

It associates pitch chroma with visual colors, tracks your performance over time, allows you to experiment with different timbres, and allows you to save data in a simple text format for outside processing.

The interface.

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Here’s a Python script which interfaces between OSC and the pucktronix.snake.corral. It’s a work-in-progress, but allows you to toggle individual switches via OSC. You can download the source here: https://bitbucket.org/pucktronix/pucktronix.snake.corral/src/3e9b712971df/control_software/pySnakeCorral.py

 1 __author__ = 'Greg Surges'
 2 
 3 '''
 4     pySnakeCorral.py
 5     interface between OSC messages and pucktronix.snake.corrral hardware
 6     created 08.18.2011
 7     last modified 03.26.2012
 8     greg surges - pucktronix
 9     surgesg@gmail.com
10     http://www.gregsurges.com/
11 '''
12 
13 import OSC
14 import threading
15 import serial
16 from serial.tools.list_ports import comports
17 import time
18 
19 ThreadRun = True
20 
21 address = '127.0.0.1', 9999
22 server = OSC.OSCServer(address)
23 
24 print "Server Initialized..."
25 print "Listening on Port: " + str(address[1])
26 
27 server.addDefaultHandlers()
28 
29 ser = serial.Serial()
30 
31 def init_port():
32         ''' poll serial ports, prompt user for port, open port '''
33         ports = comports()
34         for i, port in enumerate(ports):
35                 print "[" + str(i) + "]" + " " + port[0]
36         port_choice = input("select serial port: ")
37         ser.baudrate = 19200
38         ser.port = ports[port_choice][0]
39         ser.open()
40         if ser.isOpen(): print "opened serial port"
41 
42 def write_bytes(bytes):
43         ''' write bytes to serial port corresponding to a single pin being toggled '''
44         ser.write(bytes)
45 
46 init_port()
47 
48 def print_msg(addr, tags, stuff, source):
49         ''' just print out received data '''
50         print "---"
51         print "received new osc msg from %s" % OSC.getUrlStr(source)
52         print "with addr : %s" % addr
53         print "typetags %s" % tags
54         print "data %s" % stuff
55         print "---"
56 
57 def pin_msg(addr, tags, stuff, source):
58         ''' toggle a single pin on/off '''
59         # osc message should look like "/matrix/one x y state" to match max 
60         if addr == '/matrix/one': chip_byte = 255
61         if addr == '/matrix/two': chip_byte = 254
62         x = stuff[0]
63         y = stuff[1]
64         state = stuff[2]
65         # print chip_byte, x, y, state
66         bytes = ''.join([chr(i) for i in [chip_byte, x, y, state]])
67         write_bytes(bytes)
68 
69 server.addMsgHandler("/print", print_msg) # adding our function
70 server.addMsgHandler("/matrix/one", pin_msg) # add msgs for matrix one 
71 server.addMsgHandler("/matrix/two", pin_msg) # add msgs for matrix two 
72 
73 def osc_process():
74         while ThreadRun:
75                 server.serve_forever
76         print "Stopping OSCServer Thread"
77 
78 
79 print "\nStarting OSCServer. Use ctrl-C to quit."
80 st = threading.Thread( target = osc_process)
81 st.start()
82 
83 try:
84         while 1:
85                 time.sleep(5)
86 except KeyboardInterrupt:
87         ThreadRun = False
88         server.close()